Wave equations of two particles are given by ${y_1} = a\sin (\omega \,t - kx)$, ${y_2} = a\sin (kx + \omega \,t)$, then
  • A
    They are moving in opposite direction
  • BPhase between them is $90°$
  • CPhase between them is $180°$
  • DPhase between them is $0°$
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